Rare earth molten salt electrolytic ingot casting device

Abstract

The present invention discloses a rare earth molten salt electrolytic ingot casting device, which specifically relates to the field of rare earth molten salt electrolysis technology. The device comprises a base, an electrolytic smelting assembly is arranged on the base, and the electrolytic smelting assembly includes an electrolytic plate arranged on the top of the base, a plurality of heat-conducting plates are arranged on the top of the electrolytic plate, and a diverter groove is formed between each adjacent heat-conducting plate. When direct current is conducted through the conductive ring, the pad and the tungsten alloy plate assembly, the liquid rare earth metal can be directionally diverted through the diverter groove and the diverter hole between the adjacent heat-conducting plates. The raw materials that are not completely reacted are retained in the chute for continuous heating and electrolysis. The external air flow is sucked in and pressurized through the diverter hole to avoid the retention problem caused by the tension of the inner wall of the crucible. It can also generate bubbles in the liquid metal, and the bubbles float up to absorb and remove oxide particles, significantly reducing the ingot porosity defects, improving the purity of the product, and also avoiding the poor electrolytic smelting effect caused by uneven heating when the raw materials are electrolytically smelted in the crucible.

Description

Technical Field

[0001] The present invention relates to the technical field of rare earth molten salt electrolysis, and more particularly to a rare earth molten salt electrolysis ingot casting device. Background Art

[0002] The rare earth molten salt electrolytic ingot casting process seamlessly combines electrolytic reduction with continuous casting. Its core is that the liquid rare earth metal produced by electrolysis is collected in real time, guided into a mold for cooling and solidification, and then continuously pulled out into ingots through a mechanical device.

[0003] Among them, the patent with announcement number CN219490184U discloses a rare earth molten salt electrolytic ingot casting device, including a main body mechanism, a practical mechanism and a smelting mechanism, the practical mechanism is located above the main body mechanism, the smelting mechanism is located inside the practical mechanism, the main body mechanism includes a base, a pulley connecting column, a fixing nut, a rotating bearing and a tire, the pulley connecting column is fixedly mounted on the lower end of the base, the upper end of the pulley connecting column is fixedly connected to the lower end of the base, the fixing nut is movably mounted on the lower end of the pulley connecting column, the rotating bearing is movably mounted on the lower end of the pulley connecting column, and the tire is movably mounted on the lower end of the pulley connecting column;

[0004] When this structure is in use, the material is placed into the crucible inside the smelting box through the feed pipe, the gas switch is turned on, and the gas is connected to the gas inlet through the intake pipe to enter the combustion, so that it is melted more quickly in the crucible. However, the raw materials of this structure are gathered together in the crucible, which makes it difficult for direct current to pass through, and the efficiency of reducing rare earth ions to liquid metal atoms is low. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a rare earth molten salt electrolytic ingot casting device, which aims to solve the problems raised in the above-mentioned background technology.

[0006] The present invention provides the following technical solution: a rare earth molten salt electrolytic ingot casting device, comprising a base, on which an electrolytic smelting component is provided;

[0007] The electrolytic smelting assembly includes an electrolytic plate arranged on the top of the base, a plurality of heat-conducting plates are arranged on the top of the electrolytic plate, and a diversion groove is formed between each adjacent two heat-conducting plates, and a plurality of diversion grooves are respectively provided with an inclined groove in the middle, and a plurality of diversion holes are formed through each diversion groove;

[0008] A conductive ring is provided on the top of the electrolytic disk, and the conductive ring is located in the middle of the shunt tank. A plurality of pads are provided on the conductive ring, and a first tungsten alloy disk is covered on the outside of each pad. A second tungsten alloy disk is sleeved on the first tungsten alloy disk, and a plurality of long waist holes are opened through the second tungsten alloy disk. The plurality of pads are embedded in the top of the conductive ring, and a discharge slot cavity is formed between two adjacent pads. Conductive rods are respectively provided on the plurality of pads, and the conductive rods extend to the first tungsten alloy disk and are slidably connected to the first tungsten alloy disk.

[0009] It can be seen that in the above technical solution, the raw materials added into the crucible can be gathered together by the truncated cone-shaped inclined surfaces formed by each heat-conducting disk and the chute, and the current is transmitted to the conductive rod, the pad and the first tungsten alloy disk through the conductive ring. The direct current passes through the cathode (tungsten / molybdenum) and the anode (graphite) immersed in the high-temperature molten rare earth salt. At the cathode, the rare earth ions are reduced to liquid metal atoms. The liquid metal atoms can be diverted on the heat-conducting disk through the diverter groove between the two adjacent heat-conducting disks, so that the liquid metal atoms can flow out through the diverter groove, while the remaining raw materials can be trapped in the chute and continuously heated by the heat-conducting disk.

[0010] Optionally, in a possible embodiment, a vertical cylinder is installed at the bottom of the electrolytic disk through a flange, a guide hole is opened through one side of the surface of the vertical cylinder, a discharge pipe is installed on the guide hole through a flange, a top plug is slidably connected in the vertical cylinder, a turntable is provided at the bottom of the top plug, the turntable is located in the base and is rotatably connected to the base, an eccentric rod is rotatably connected to one side of the turntable, the top end of the eccentric rod extends to the top plug and is hinged to the top plug, a top rod is provided at the top of the top plug, a rotating shaft is provided on the side of the turntable away from the eccentric rod, the rotating shaft is rotatably connected to the base, and a motor for driving the rotating shaft to rotate is provided at one end of the base, and a current controller is provided on one side of the surface of the motor;

[0011] It can be seen that in the above technical solution, the motor drives the rotating shaft and the turntable to rotate. When the turntable rotates, it drives the eccentric rod to rotate and displace along the axial direction of the rotating shaft and pulls the top plug and the top rod to move up and down in the vertical cylinder. When the top plug moves upward, the external airflow is drawn into the vertical cylinder through the guide hole. The top plug and the top rod continue to move upward so that the top rod hits the bottom end of the top block and pushes the top block to move upward. The pressurized airflow is transported to the crucible through the middle of the conductive ring. When the top rod moves upward, it pushes the second tungsten alloy disk and tungsten alloy rod to move upward. When the second tungsten alloy disk moves upward, the liquid metal atoms in the crucible flow through the top plug into the middle of the conductive ring and into the top plug, and are discharged into the mold through the guide hole and the discharge pipe for forming.

[0012] Optionally, in a possible embodiment, a top block is provided in the middle of the first tungsten alloy disk, a spring is sleeved on the outside of the top block, and the bottom end of the spring abuts against the conductive ring, a tungsten alloy rod is provided in the middle of the second tungsten alloy disk, the bottom end of the tungsten alloy rod extends to the top of the top block and is threadedly connected to the top block, and the top of the top block extends to the top of the inner cavity of the second tungsten alloy disk, a crucible is provided on the top of the electrolytic disk, and the crucible is sleeved on the outside of the heat-conducting disk, a plurality of the heat-conducting disks are stacked, and the vertical cross-section shape of each of the chute is combined into a truncated cone shape, the vertical cross-section shape of the second tungsten alloy disk is set to a truncated cone shape, and the bottom end of the second tungsten alloy disk extends to the outside of the first tungsten alloy disk;

[0013] It can be seen that in the above technical solution, when the top rod pushes the top block to drive the second tungsten alloy disk and the tungsten alloy rod to move upward, the liquid metal on the outside of the second tungsten alloy disk can also flow through the long waist hole, which indirectly stirs the liquid metal and avoids poor electrolytic melting effect due to uneven heating during electrolytic melting of the raw materials in the crucible.

[0014] The technical effects and advantages of the present invention are as follows:

[0015] The stacked heat-conducting plates and frustum-shaped chute structure create a gradient distribution of raw materials within the crucible, expanding the electrolytic reaction area. When direct current is conducted through the conductive ring, backing plate, and tungsten alloy plate assembly, liquid rare earth metal can be diverted directionally through the diversion grooves and diversion holes between adjacent heat-conducting plates. Unreacted raw materials remain in the chute for continued heating and electrolysis.

[0016] The present invention drives the top plug to reciprocate by an eccentric rod, thereby achieving the suction and pressurized delivery of external airflow through the guide hole, avoiding the retention problem caused by the tension of the inner wall of the crucible, and generating bubbles in the liquid metal. The bubbles float up to absorb and remove oxide particles, significantly reducing the porosity defects of the ingot and improving the purity of the product.

[0017] When the push rod of the present invention pushes the push block to drive the second tungsten alloy disk to move up and down, its frustum-shaped outer wall and long waist hole structure promote convection stirring of the liquid metal. Combined with the stacked heat conduction design of the heat conduction disk, it effectively solves the problem of electrolysis efficiency fluctuation caused by uneven heating in traditional devices, ensures a stable and efficient reaction process, and avoids poor electrolysis smelting effect caused by uneven heating when the raw materials are electrolytically smelted in the crucible;

[0018] In summary, when direct current is conducted through the conductive ring, pad and tungsten alloy disk assembly, the liquid rare earth metal can be directionally diverted through the diversion grooves and diversion holes between adjacent heat-conducting disks. The unreacted raw materials remain in the chute for continuous heating and electrolysis. The external air flow is sucked in and pressurized through the diversion holes, avoiding the retention problem caused by the tension of the inner wall of the crucible. It can also generate bubbles in the liquid metal, and the bubbles float up to absorb and remove oxide particles, significantly reducing the porosity defects of the ingot, improving the purity of the product, and avoiding poor electrolytic smelting effect due to uneven heating during the electrolytic smelting of the raw materials in the crucible. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. Furthermore, the drawings described below are schematic diagrams and are not intended to limit the actual dimensions of the products, actual processes of the methods, actual timing of signals, and the like involved in the embodiments of the present disclosure.

[0020] Figure 1 It is the main view of the overall structure of the present invention.

[0021] Figure 2 This is a cross-sectional view of the electrolytic smelting assembly of the present invention.

[0022] Figure 3 This is a schematic diagram of the electrolytic plate, heat conducting plate, current controller, motor and base installed together.

[0023] Figure 4 Schematic diagram of the conductive ring, backing plate, first tungsten alloy disk, second tungsten alloy disk and tungsten alloy rod of the present invention.

[0024] Figure 5 Schematic diagram of the tungsten alloy rod, top block and spring of the present invention.

[0025] Figure 6 Schematic diagram of the second tungsten alloy disk, the first tungsten alloy disk, the conductive ring, the backing plate and the conductive rod of the present invention.

[0026] Figure 7 Schematic diagram of the heat conducting plate of the present invention.

[0027] Figure 8 It is a schematic diagram of the rotating shaft, rotating disk, eccentric rod and top plug of the present invention.

[0028] The accompanying drawings are marked as follows: 1. base; 2. electrolytic plate; 3. heat conduction plate; 4. diverter trough; 5. inclined trough; 6. diverter hole; 7. conductive ring; 8. pad; 9. first tungsten alloy plate; 10. second tungsten alloy plate; 11. long waist hole; 12. discharge trough cavity; 13. conductive rod; 14. vertical cylinder; 15. diversion hole; 16. discharge pipe; 17. top plug; 18. turntable; 19. eccentric rod; 20. rotating shaft; 21. motor; 22. current controller; 23. crucible; 24. top block; 25. spring; 26. tungsten alloy rod; 27. top rod. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] As attached Figures 1-8 The rare earth molten salt electrolytic ingot casting apparatus shown in the figure uses an electrolytic smelting assembly provided on a base 1. When direct current is conducted through a conductive ring 7, a backing plate 8, and a tungsten alloy disk assembly, liquid rare earth metal can be directionally diverted through the diverter grooves 4 and diverter holes 6 between adjacent heat-conducting disks. Unreacted raw materials are retained in the chute 5 for continuous heating and electrolysis. This can avoid poor electrolytic smelting effects caused by uneven heating during electrolytic smelting of the raw materials in the crucible 23. The specific structural configuration of the assembly is as follows;

[0031] The electrolytic smelting assembly includes an electrolytic plate 2 disposed on top of a base 1. A plurality of heat conducting plates 3 are disposed on top of the electrolytic plate 2. A diverter trough 4 is formed between each adjacent two heat conducting plates 3. An inclined groove 5 is provided in the middle of each of the plurality of diverter troughs 4. Furthermore, a plurality of diverter holes 6 are provided through each of the diverter troughs 4.

[0032] A conductive ring 7 is provided on the top of the electrolytic disk 2, and the conductive ring 7 is located in the middle of the shunt tank 4. A plurality of pads 8 are provided on the conductive ring 7, and the outer side of each pad 8 is covered with a first tungsten alloy disk 9. A second tungsten alloy disk 10 is sleeved on the first tungsten alloy disk 9, and a plurality of long waist holes 11 are opened through the second tungsten alloy disk 10. Multiple pads 8 are embedded in the top of the conductive ring 7, and a discharge slot cavity 12 is formed between two adjacent pads 8. Conductive rods 13 are respectively provided on the multiple pads 8, and the conductive rods 13 extend to the first tungsten alloy disk 9 and are slidably connected to the first tungsten alloy disk 9.

[0033] A vertical cylinder 14 is installed at the bottom of the electrolytic disk 2 through a flange. A diversion hole 15 is opened on one side of the surface of the vertical cylinder 14. A discharge pipe 16 is installed on the diversion hole 15 through a flange. A top plug 17 is slidably connected in the vertical cylinder 14. A turntable 18 is provided at the bottom of the top plug 17. The turntable 18 is located in the base 1 and is rotatably connected to the base 1. An eccentric rod 19 is rotatably connected to one side of the turntable 18. The top of the eccentric rod 19 extends to the top plug 17 and is hinged to the top plug 17. A top rod 27 is provided at the top of the top plug 17. A rotating shaft 20 is provided on the side of the turntable 18 away from the eccentric rod 19. The rotating shaft 20 is rotatably connected to the base 1, and a motor 21 for driving the rotating shaft 20 to rotate is provided at one end of the base 1. A current controller 22 is provided on one side of the surface of the motor 21.

[0034] A top block 24 is provided in the middle of the first tungsten alloy disk 9, and a spring 25 is sleeved on the outside of the top block 24. The bottom end of the spring 25 abuts against the conductive ring 7. A tungsten alloy rod 26 is provided in the middle of the second tungsten alloy disk 10. The bottom end of the tungsten alloy rod 26 extends to the top of the top block 24 and is threadedly connected to the top block 24, and the top of the top block 24 extends to the top of the inner cavity of the second tungsten alloy disk 10. A crucible 23 is provided on the top of the electrolytic disk 2, and the crucible 23 is sleeved on the outside of the heat-conducting disk 3. Multiple heat-conducting disks 3 are stacked, and the vertical cross-sectional shape of each chute 5 is combined into a truncated cone shape. The vertical cross-sectional shape of the second tungsten alloy disk 10 is set to be truncated cone, and the bottom end of the second tungsten alloy disk 10 extends to the outside of the first tungsten alloy disk 9.

[0035] The specific working principle is as follows: when the raw materials are electrolytically cast, (as shown in the attached Figure 1 、 2 3), the raw materials are added into the crucible 23 and the truncated cone-shaped inclined surfaces formed by the heat conducting plates 3 and the chute 5 can be gathered together. (As shown in the attached Figure 4 、 5 6 ), the current of the electrolytic disk 2 is controlled by the current controller 22, and the current is transmitted to the conductive rod 13, the pad 8 and the first tungsten alloy disk 9 through the conductive ring 7. The direct current passes through the cathode (tungsten / molybdenum) and the anode (graphite) immersed in the high-temperature molten rare earth salt, and the rare earth ions are reduced to liquid metal atoms at the cathode.

[0036] Furthermore, the liquid metal atoms can be diverted on the heat conducting plates 3 through the diverter groove 4 between two adjacent heat conducting plates 3 , so that the liquid metal atoms can flow out through the diverter groove 4 , while the remaining raw materials can be retained in the chute 5 and continuously heated by the heat conducting plates 3 .

[0037] After the raw materials are electrolyzed into liquid metal atoms, (such as Figure 2 、 58), the motor 21 drives the rotating shaft 20 and the turntable 18 to rotate. When the turntable 18 rotates, the eccentric rod 19 is driven to rotate and displace axially along the rotating shaft 20 and pull the top plug 17 and the top rod 27 to move up and down in the vertical cylinder 14. When the top plug 17 moves upward, the external airflow is drawn into the vertical cylinder 14 through the guide hole 15. The top plug 17 and the top rod 27 continue to move upward, causing the top rod 27 to abut against the bottom end of the top block 24 and push the top block 24 to move upward. The pressurized airflow is transported to the crucible 23 through the middle of the conductive ring 7. When the top rod 27 moves upward, it pushes the second tungsten alloy disk 10 and the tungsten alloy rod 26 to move upward. When the second tungsten alloy disk 10 moves upward, the liquid metal atoms in the crucible 23 flow through the top plug 17 into the middle of the conductive ring 7 and into the top plug 17, and are discharged into the mold through the guide hole 15 and the discharge pipe 16 for forming.

[0038] In the process of the top plug 17 moving upward to eject the air flow through the conductive ring 7, the high-pressure air flow is sprayed on the liquid metal atoms, realizing the indirect promotion or transportation of the liquid metal by the high-pressure gas, avoiding the formation of tension with the inner wall of the crucible 23 during the liquid metal transportation process, which makes it impossible for the liquid metal to be discharged. In addition, the gas can generate bubbles when it is transported into the liquid metal. The bubble floating process absorbs and carries away the dissolved oxide particles, bringing them to the surface to form a slag layer, effectively reducing the porosity defects in the ingot.

[0039] Furthermore, when the top rod 27 pushes the top block 24 to drive the second tungsten alloy disk 10 and the tungsten alloy rod 26 to move upward, the liquid metal long waist hole 11 outside the second tungsten alloy disk 10 can flow, which indirectly stirs the liquid metal and avoids poor electrolytic melting effect due to uneven heating during electrolytic melting of the raw materials in the crucible 23.

[0040] Different from the prior art, the present application discloses a rare earth molten salt electrolytic ingot casting device. When direct current is conducted through the conductive ring 7, the pad 8 and the tungsten alloy disk assembly, the liquid rare earth metal can be directionally diverted through the diversion groove 4 and the diversion hole 6 between adjacent heat-conducting disks. The raw materials that have not completely reacted are retained in the inclined groove 5 for continuous heating and electrolysis. The external air flow is sucked in and pressurized through the guide hole 15 to avoid the retention problem caused by the tension of the inner wall of the crucible. It can also generate bubbles in the liquid metal, and the bubbles float up to absorb and remove oxide particles, significantly reducing the ingot porosity defects, improving the purity of the product, and avoiding poor electrolytic smelting effect due to uneven heating when the raw materials are electrolytically smelted in the crucible 23.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rare earth molten salt electrolytic ingot casting device, comprising a base (1), characterized in that: An electrolytic smelting component is provided on the base (1); The electrolytic smelting assembly comprises an electrolytic plate (2) arranged on the top of a base (1), a plurality of heat-conducting plates (3) are arranged on the top of the electrolytic plate (2), and a diversion groove (4) is formed between each two adjacent heat-conducting plates (3), a plurality of diversion grooves (4) are respectively provided with an inclined groove (5) in the middle, and a plurality of diversion holes (6) are provided through each of the diversion grooves (4); A conductive ring (7) is provided on the top of the electrolytic disk (2), and the conductive ring (7) is located in the middle of the diversion trough (4). A plurality of pads (8) are provided on the conductive ring (7), and a first tungsten alloy disk (9) is provided on the outer side of each pad (8). A second tungsten alloy disk (10) is provided on the first tungsten alloy disk (9), and a plurality of long waist holes (11) are provided through the second tungsten alloy disk (10).

2. The rare earth molten salt electrolytic ingot casting device according to claim 1, characterized in that: The plurality of pads (8) are embedded together on the top of the conductive ring (7), and a discharge slot cavity (12) is formed between two adjacent pads (8). Conductive rods (13) are respectively provided on the plurality of pads (8), and the conductive rods (13) extend to the first tungsten alloy disk (9) and are slidably connected to the first tungsten alloy disk (9).

3. The rare earth molten salt electrolytic ingot casting device according to claim 1, characterized in that: A vertical cylinder (14) is mounted on the bottom of the electrolytic plate (2) via a flange, a guide hole (15) is provided through one side of the surface of the vertical cylinder (14), and a discharge pipe (16) is mounted on the guide hole (15) via a flange.

4. The rare earth molten salt electrolytic ingot casting device according to claim 1, characterized in that: A top block (24) is provided in the middle of the first tungsten alloy disk (9), a spring (25) is sleeved on the outer side of the top block (24), and the bottom end of the spring (25) contacts the conductive ring (7).

5. The rare earth molten salt electrolytic ingot casting device according to claim 4, characterized in that: A tungsten alloy rod (26) is provided in the middle of the second tungsten alloy disk (10), the bottom end of the tungsten alloy rod (26) extends to the top of the top block (24) and is threadedly connected to the top block (24), and the top of the top block (24) extends to the top of the inner cavity of the second tungsten alloy disk (10).

6. The rare earth molten salt electrolytic ingot casting device according to claim 3, characterized in that: A top plug (17) is slidably connected in the vertical cylinder (14), and a turntable (18) is provided at the bottom of the top plug (17). The turntable (18) is located in the base (1) and is rotatably connected to the base (1). An eccentric rod (19) is rotatably connected to one side of the turntable (18), and the top end of the eccentric rod (19) extends to the top plug (17) and is hinged to the top plug (17). A top rod (27) is provided at the top end of the top plug (17).

7. The rare earth molten salt electrolytic ingot casting device according to claim 6, characterized in that: A rotating shaft (20) is provided on a side of the rotating disk (18) away from the eccentric rod (19), the rotating shaft (20) is rotatably connected to the base (1), and a motor (21) for driving the rotating shaft (20) to rotate is provided at one end of the base (1), and a current controller (22) is provided on one side of the surface of the motor (21).

8. The rare earth molten salt electrolytic ingot casting device according to claim 1, characterized in that: A crucible (23) is provided on the top of the electrolytic plate (2), and the crucible (23) is sleeved on the outside of the heat conducting plate (3).

9. The rare earth molten salt electrolytic ingot casting device according to claim 1, characterized in that: The plurality of heat conducting plates (3) are stacked, and the vertical cross-sections of the inclined grooves (5) are combined into a truncated cone shape.

10. The rare earth molten salt electrolytic ingot casting device according to claim 1, characterized in that: The vertical cross-section of the second tungsten alloy disk (10) is configured as a truncated cone, and the bottom end of the second tungsten alloy disk (10) extends to the outside of the first tungsten alloy disk (9).

Images